diff --git a/platformio/builder/tools/platformio.py b/platformio/builder/tools/platformio.py
index bd4dd53c..3334e978 100644
--- a/platformio/builder/tools/platformio.py
+++ b/platformio/builder/tools/platformio.py
@@ -264,7 +264,7 @@ def ProcessUnFlags(env, flags):
                     env[key].remove(current)
 
 
-def StringifyMacro(env, value):
+def StringifyMacro(env, value):  # pylint: disable=unused-argument
     return '\\"%s\\"' % value.replace('"', '\\\\\\"')
 
 
diff --git a/tests/commands/test_run.py b/tests/commands/test_run.py
index b4321a10..b747e427 100644
--- a/tests/commands/test_run.py
+++ b/tests/commands/test_run.py
@@ -299,4 +299,4 @@ projenv.Append(CPPDEFINES=[
     assert "MACRO_1=<Hello World!>" in result.output
     assert 'MACRO_2=<Text is "Quoted">' in result.output
     assert 'MACRO_3=<Hello "World"! Isn\'t true?>' in result.output
-    assert 'MACRO_4=<Special chars: \',(,),[,],:>' in result.output
+    assert "MACRO_4=<Special chars: ',(,),[,],:>" in result.output